Booooooy does that behavior come from a lot of different places but come to the same result. I identify with this so strongly, not as a GM, but as a roleplayer who is pretty good at writing but interests and time constraints that make it pretty difficult to participate in the stories I would otherwise like to. This means I have to make exceptions and, for lack of a kinder term, "write down," to participate in some of the stories I've helped write years ago. People need to take the time to appreciate their skills/interests and the limitations it means they will have to work with, otherwise not only are they cherry picking out of their strike range with stories they as a player might not have the time/patience for, but their standards might not be realistic enough to let them discover story environments they could truly thrive in.